Photosensitive Composition Light Moisture Resistance
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Solution Overview
Problem
Photosensitive compositions containing blue pigments tend to degrade in light and moisture, leading to reduced performance in color filters and solid-state imaging elements, necessitating improved light and moisture resistance.
Innovation Solution
A photosensitive composition comprising a blue pigment, a transparent pigment derivative with a triazine ring, and a chromatic pigment derivative, such as a phthalocyanine compound, with specific molar absorption coefficients and spectral characteristics, along with a polymerizable monomer and photopolymerization initiator, to enhance light and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a blue pigment is used in the photosensitive composition, then the color filter can achieve blue color characteristics, but the film tends to be discolored by irradiation with light
Solution Approach 1:
The patent uses a composite pigment system consisting of a blue pigment (e.g., phthalocyanine) combined with a transparent pigment derivative (e.g., triazine ring compound) having specific molar absorption coefficient characteristics. This composite approach allows the blue pigment to provide color characteristics while the transparent pigment derivative with controlled absorption properties protects against light-induced discoloration, achieving both color fidelity and light resistance.
Solution Approach 2:
The patent controls the molar absorption coefficient of the transparent pigment derivative within specific ranges (3,000-10,000 L·mol⁻¹·cm⁻¹) to optimize light absorption characteristics. By adjusting this parameter, the composition achieves adequate light absorption for protection while maintaining transparency and preventing discoloration, resolving the contradiction between light resistance and color stability.
2Stability of the object's composition
If a pigment is dispersed in the photosensitive composition using a pigment derivative, then the pigment can be effectively distributed, but the film shows reduced moisture resistance
Solution Approach 1:
The patent employs a transparent pigment derivative as an intermediary substance that facilitates effective pigment dispersion while simultaneously providing moisture resistance. This intermediary compound acts as a bridge between the pigment particles and the photosensitive composition matrix, ensuring uniform distribution without compromising moisture barrier properties.
Solution Approach 2:
The patent specifies that the transparent pigment derivative should have a molar absorption coefficient between 3,000-10,000 L·mol⁻¹·cm⁻¹, which optimizes both dispersion characteristics and moisture resistance. This parameter control ensures that the pigment derivative effectively disperses the blue pigment while maintaining adequate moisture barrier properties in the final film.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition forms a film with excellent light and moisture resistance, maintaining spectral characteristics and stability, suitable for use in color filters and solid-state imaging elements.
Implementation Method 1
a polymerizable monomer; and a photopolymerization initiator
Implementation Method 2
a transparent pigment derivative B1 and a chromatic pigment derivative B2, in which a maximum value of a molar absorption coefficient of the pigment derivative B1 in a wavelength range of 400 to 700 nm is 3,000 L·mol−1·cm−1 or less
Data Source
AI summary
Provided are a photosensitive composition containing a colorant A including a pigment, a pigment derivative B, and a resin C, in which the colorant A includes a blue pigment, the pigment derivative B includes a transparent pigment derivative B1 and a chromatic pigment derivative B2, and a total content of the colorant A and the pigment derivative B in a total solid content of the photosensitive composition is 40% by mass or more; a film formed of the photosensitive composition; a color filter; a solid-state imaging element; and an image display device.